import * as T from            'http://esm.sh/three';
import { OrbitControls } from 'http://esm.sh/three/examples/jsm/controls/OrbitControls.js';

export { T as THREE };
export function Scene(inSettings)
{
    const renderer = new T.WebGLRenderer({canvas:document.querySelector(inSettings.DOM)});
    const scene = new T.Scene();
    const camera = new T.PerspectiveCamera(80, 2, 0.1, 100);
    const light = new T.DirectionalLight(0xFFFFFF, 1);
    const controls = new OrbitControls(camera, renderer.domElement);
    let dirty = false;

    const update = inTime =>
    {
        let timeNew = new Date();
        let timeDelta = timeNew - inTime;
        let delta = timeDelta * 0.001;
        
        inSettings.Update(scene, delta);

        controls.update();
        dirty = true;
        setTimeout(()=>update(timeNew), 50);
    }

    const render = inTime =>
    {
        if(dirty)
        {
            renderer.render(scene, camera);
            dirty = false;
        }
        requestAnimationFrame(render);
    }

    const resize = () =>
    {
        let canvas = renderer.domElement;
        camera.aspect = canvas.clientWidth / canvas.clientHeight;
        camera.updateProjectionMatrix();
        renderer.setSize(canvas.clientWidth, canvas.clientHeight, false);
    };
    
    scene.add(light);
    //scene.add(new T.GridHelper(10, 10));
    light.position.set(-1, 2, 4);
    camera.position.set(0, 5, -5);
    camera.lookAt(new T.Vector3(0,0,0));
    controls.update();

    inSettings.Init(scene);

    window.addEventListener("resize", resize);
    resize();
    render(0);
    update(new Date());
};